36results about How to "Accurate speed adjustment" patented technology

The invention discloses a speed regulation control method of air conditioner outdoor fan. The method uses the temperature of conditioner outdoor coil pipe to reflect the system pressure. The RPM regulation and control strategy of the outdoor fan is designed base on the combinational factors of changes of the outdoor environmental temperature and the outdoor coil pipe temperature. Through the control of outdoor fan RPM the outdoor coil pipe temperature can be regulated. Through controlling the outdoor coil pipe temperature within the set range of temperature the system pressure can be stabilized within the scope of the reliable operation of the compressor, therefore the safe operation of the compressor can be guaranteed. Because the precise regulation of the PRM of the outdoor fan can be achieved without the unnecessary pressure sensor installation in the air conditioner system for collecting the system pressure, so the accruement of hardware cost of the product can be avoided. At the same time the stepless speed regulation is used in the outdoor fan to enhance the stability of the system pressure control, and improve the air conditioning system work performance. The method is especially useful for the base station air conditioner to enhance the system operation reliability of the base station air conditioner.

The invention relates to a multifunctional rotary tillage, fertilization and seeding machine, in particular to a multifunctional rotary tillage, fertilization and seeding machine suitable for seeding of rice, wheat and oilseed rape, which belongs to the technical field of agriculture and forestry machines. The multifunctional rotary tillage, fertilization and seeding machine comprises a rack; a rotary tillage ditching mechanism and an auxiliary ditching mechanism are arranged on the front part of the rack, a seeding and fertilization mechanism is arranged in the middle part of the rack, and a pressing and covering mechanism is arranged on the rear part of the rack; one side of the rack is provided with a first speed changer connected with an external power output end, and the other side of the rack is provided with land wheels; the seeding and fertilization mechanism comprises a fertilizer unit and a seeder unit, a power output end of the first speed changer is connected with a power input end of the rotary tillage ditching mechanism, and the land wheels are connected with power input ends of the fertilizer unit and the seeder unit through transmission chains, respectively. The multifunctional rotary tillage, fertilization and seeding machine has the functions of simultaneously performing rotary tillage, fertilization and seedling in one operation.

The invention provides a fan speed control method, a fan speed control device and a projection system cooling method. The method comprises the following steps: acquiring the air temperature of the air inlet and the air temperature of the air outlet of electronic equipment in an nth time period and the total amount of heat generated by the electronic equipment in the nth time period, wherein n is an integer greater than or equal to 1; and determining the speed of a fan at the air inlet and the speed of a fan at the air outlet in an (n+1)th time period adjacent to the nth time period according to the total amount of heat generated by the electronic equipment in the nth time period, the air temperature of the air inlet and the air temperature of the air outlet. According to the fan speed control method, the fan speed control device and the projection system cooling method provided by the embodiments of the invention, through control on accumulation of heat in the electronic equipment, the speed of the fans can be adjusted before temperature rise, and the electronic equipment can be cooled in a timely manner.

The invention discloses a system for measuring a dynamic friction coefficient of yarns. The method comprises a pre-tensioning device, start-stop buttons, a first tension measuring device, a second tension measuring device, a buffer device, a proximity switch, pulleys, indicator lights, a rotating speed measuring device for measuring a running speed of the yarns, a rotating speed adjusting knob, ayarn guiding device, a tangling device, a first stepping motor and an input roller mounted on a spindle thereof, a second stepping motor and an output roller mounted on the spindle thereof, an air tube connected with the yarn guiding device, an air pump connected with the air tube and a residual yarn basket for collecting residual yarns, which are mounted on a front panel of a chassis, as well asa power supply module, an analogue collection module, a relay module, a communication module and a stepping motor driver mounted on the back of the front panel of the chassis. The system provided by the invention has advantages of low use cost, simple operation, capability of testing a constant tension, high detection efficiency and test precision, implementation of real-time control, breakage self-stopping function, buffer anti-breakage function and the like.

The invention belongs to the field of aero-engine disc-shaft connection rotor system thermal effect analysis and thermal deformation measurement, and relates to a disc-shaft connection rotor system thermal analysis test bench and a thermal deformation measurement method. The test bench is mainly composed of an electric drive and control system, an ignition system, a heat insulation system, a nonlinear support-rotor system, a test sensing system and a base. The heating temperature of a disc-shaft connection rotor system can be accurately controlled by an igniter. By adjusting the gas valve of the igniter, the firepower of the igniter can be controlled, and the disc-shaft connection rotor system can be heated within different temperature ranges. The thermal deformation of a disc-shaft connection rotor system in an environment with uniform temperature distribution can be measured, and the thermal deformation in an environment with non-uniform temperature distribution and the thermal deformation under a variable speed condition can be measured.

The invention discloses a single bracket electromobile motor stator and a manufacturing method, and belongs to the technical field of motor stator manufacturing. The motor stator comprises a stator core (1) and a bracket body (2), wherein the bracket body (2) comprises a core mounting part (201), a supporting part (202) and a shaft sleeve (203); one end of the core mounting part (201) is connectedwith the supporting part (202); a flange (204) is arranged at the other end of the core mounting part (201); the shaft sleeve (203) is arranged in the center of the supporting part (202); and insulating sheets (3) are arranged on the two sides of the stator core (1). The manufacturing method comprises the steps of spinning, material cutting, notching, winding, riveting, reshaping, press mountingand fixing. According to the motor stator and the manufacturing method, the quality of a stator sheet can be improved; the efficiency of a motor can be high; the motor can operate stably; the performance of the motor can be good; and the production efficiency can be improved.

The invention provides a fan rotating speed control method and device and a heat dissipating method of a projection system. The method comprises the steps of obtaining a fan rotating speed, a heating total quantity and a heat dissipating total quantity in the nth time period and an air outlet air temperature in the n+1th time period; determining a predicted fan rotating speed in the n+1th time period according to the heating total quantity and the heat dissipating total quantity in the nth time period and the air outlet air temperature in the n+1th time period; and determining the fan rotating speed in the n+1th time period according to the fan rotating speed in the nth time period and the predicted fan rotating speed and a preset rotating speed adjusting threshold in the n+1th time period. The fan rotating speed control method and device and the projection system can be used for adjusting the fan rotating speed before the temperature rises through controlling the heat accumulation in electronic equipment.

The invention discloses an integrated testing device under a multi-field coupling environment, which comprises a mechanical behavior experiment system and a corrosion behavior experiment system mutually switched to realize the testing of mechanical and corrosion behaviors of a material under the multi-field coupling environment and monitor the expected performance of the material under a multi-factor collaborative interaction condition. The experimental device is simple in structure, low in cost and convenient to operate, controllable adjustment of the loading direction, the load size, the loading rate, the flow field direction, the flow field flow speed, the flow field environment temperature and the corrosive medium can be achieved, real-time, in-situ and dynamic monitoring can be conducted on materials from the aspects of mechanics, corrosion behaviors and the like, the device is suitable for samples of different materials and different sizes in different service environments, and provides technical support for scientifically and reasonably evaluating mechanical and corrosion performance evolution of materials in a simulated service environment.

The present invention discloses a submersible mixer experimental device which comprises a submersible mixer (1) and a support column (2). The tail of the submersible mixer (1) is fixed at the middle of the support column (2). The submersible mixer experimental device also comprises a first pull force sensor (4) for measuring thrust and a second pull force sensor (5) for measuring a torque. One end of the first pull force sensor (4) is fixedly connected to the upper end of the support column (2) through a steel wire rope, and the other end of the first pull force sensor (4) is connected to a first fixed point (6) through a steel wire rope. One end of the second pull force sensor (5) is fixedly connected to the upper end of the support column (2) through a steel wire rope, and the other end of the second pull force sensor (5) is connected to a second fixed point (7) through a steel wire rope. The experimental device of the invention can measure the thrust and torque of a submersible mixer at the same time, and the measurement precision is high.

The invention discloses an air-ground unmanned vehicle shared by wheels and a duct. The air-ground unmanned vehicle comprises a vehicle body, a duct fan, a motor A, a folding device, racks, a motor B,a gear and an undercarriage. The vehicle body is in bilateral symmetry state. The Four racks are arranged at the upper end of the vehicle body in the circumferential direction, and the front rack andthe rear rack are bilaterally symmetrical about the vehicle body. An outward end part of each rack is connected with a ducted fan through a folding device; each folding device drives the ducted fan to be switched between a horizontal state and a vertical state through a steering engine A arranged on the rack; a fan in each ducted fan is driven by a motor A; the duct of each ducted fan can be driven by a motor B to rotate independently, and when the ducted fans are vertical, the ducts of the four ducted fans can be in contact with the ground at the same time; a steering engine B is arranged inthe undercarriage and drives the undercarriage, one end of the undercarriage is arranged in the vehicle body, and the other end of the undercarriage can penetrate through a through hole formed in thebottom of the vehicle body to stretch; and a control module is arranged in the vehicle body and makes the motor A and the motor B rotate and the steering engine A and the steering engine B act.

The embodiment of the invention discloses a variable-frequency speed regulation control system with a load observer and a frequency converter. The variable-frequency speed regulation control system iscomposed of a rotating speed and current double-closed-loop system, the variable-frequency speed regulation control system further comprises the load observer, and the load observer comprises an adjuster and an integrator; the input end of the regulator inputs the difference between an actual rotating speed value and a rotating speed observation value, and the first output end of the regulator iselectrically connected with the output end of the rotating speed regulation module and outputs a first load torque observation value; the integrator is used for calculating a rotating speed observation value according to a second load torque observation value and the output torque of the system and outputting the rotating speed observation value to the input end of the regulator from the output end. According to the technical scheme provided by the embodiment of the invention, the change condition of the load is detected in real time through the load observer, when the load changes, the loadstate can be quickly responded, the rotating speed of the motor can be accurately adjusted, the dynamic reduction of the rotating speed of the motor can be reduced to the greatest extent in combination with vector control, and the stability of the system is favorably maintained.

The invention relates to a device for spraying contamination onto the surface of an insulator uniformly. The device comprises a rack, a stepping motor (8), a driving wheel (2), a driven wheel (16), a loading plate (6) and a contamination sprayer (15). The stepping motor (8) is fixed to the rack. The driving wheel (2) is arranged on the output shaft of the stepping motor (8). The driving wheel (2) is in transmission connection with the driven wheel (16) through a belt. A shaft body (14) is disposed on the axis of the driven wheel (16) and is rotatably connected with the rack. The loading plate (6) is arranged on the shaft body (14) for fixing the insulator (7). The contamination sprayer (15) sprays the surface of the insulator (7) with contamination during the rotation of the insulator (7). Compared with the prior art, the device has advantages of small friction, strong bearing capacity, safe and stable running, precise and controllable rotation speed, simple operation, convenient disassembly and transportation and the like.

The invention relates to the field of an anesthesia machine, in particular to a self-inspection circuit of a brushless DC motor of the anesthesia machine. The self-inspection circuit comprises a master control central processing unit (CPU), a field programmable gate array, a three-phase full-bridge driving circuit and a signal conditioning circuit, wherein the master control CPU is connected with the field programmable gate array; the three-phase full-bridge driving circuit is connected with the master control CPU and the field programmable gate array respectively; when the brushless DC motor is in self inspection, the master control CPU simulates driving signals of the three-phase full-bridge driving circuit in various rotation speed conditions, and the three-phase full-bridge driving circuit can work in various working frequencies by means of the capability of processing pin signals at a high speed by the field programmable gate array; the three-phase full-bridge driving circuit is directly connected with the brushless DC motor; and the field programmable gate array is connected with the brushless DC motor via the signal conditioning circuit and used for detecting a self-inspection signal of the brushless DC motor and sending a self-inspection result to the master control CPU, and therefore, the rotational speed of the brushless DC motor can be accurately regulated.

The invention provides an external fan control method and device and an air conditioner, and relates to the technical field of air conditioners. The external fan control method comprises the steps of obtaining the exhaust pressure of the air conditioner in real time; under the condition that the exhaust pressure falls into a first preset pressure interval, calculating a first theoretical adjusting quantity according to the exhaust pressure; adjusting the rotating speed of an external fan of the air conditioner according to the first theoretical adjusting quantity; under the condition that the exhaust pressure falls into a second preset pressure interval, obtaining a heat exchange temperature difference of an outdoor heat exchanger, wherein an upper limit value of the second preset pressure interval is equal to a lower limit value of the first preset pressure interval; calculating a second theoretical adjusting quantity according to the heat exchange temperature difference; and adjusting the rotating speed of the external fan according to the second theoretical adjusting quantity. According to the external fan control method provided by the invention, on the premise that the exhaust pressure requirement is met, the rotating speed of the external fan can be accurately adjusted, and energy waste is avoided.

The invention discloses a system for measuring a dynamic friction coefficient of yarns. The method comprises a pre-tensioning device, start-stop buttons, a first tension measuring device, a second tension measuring device, a buffer device, a proximity switch, pulleys, indicator lights, a rotating speed measuring device for measuring a running speed of the yarns, a rotating speed adjusting knob, ayarn guiding device, a tangling device, a first stepping motor and an input roller mounted on a spindle thereof, a second stepping motor and an output roller mounted on the spindle thereof, an air tube connected with the yarn guiding device, an air pump connected with the air tube and a residual yarn basket for collecting residual yarns, which are mounted on a front panel of a chassis, as well asa power supply module, an analogue collection module, a relay module, a communication module and a stepping motor driver mounted on the back of the front panel of the chassis. The system provided by the invention has advantages of low use cost, simple operation, capability of testing a constant tension, high detection efficiency and test precision, implementation of real-time control, breakage self-stopping function, buffer anti-breakage function and the like.

The invention discloses a threshing cylinder and a method for adjusting the rotating speed of the threshing cylinder during threshing. The threshing cylinder comprises a rotating shaft and a pluralityof toothed bars installed on the rotating shaft, each toothed bar is provided with a plurality of threshing teeth, and at least one toothed bar is provided with more than one force measuring tooth. The threshing cylinder further comprises a force measuring device used for detecting the material resistance borne by the force measuring teeth, material resistance data reflecting the feeding amount can be obtained through detection, the detection accuracy is high, improvement is easy, and the improvement cost is low. The method for adjusting the rotating speed comprises the steps that the material resistance borne by the force measuring teeth when the threshing cylinder rotates in a threshing device for threshing is obtained through detection, the current feeding amount in the threshing device is obtained, the rotating speed of the threshing cylinder is adjusted to be matched with the current feeding amount, and the feeding amount condition in the threshing device can be accurately obtained. Accurate adjustment of the rotating speed of the threshing cylinder is achieved, then the breakage rate and the incomplete threshing rate are reduced, and the working performance and the threshingeffect of the threshing device are improved.

The invention relates to the technical field of refrigeration equipment, and discloses a control method for refrigeration equipment, which comprises the following steps: acquiring water temperature information of chilled water exchanging heat with an evaporator; according to the water temperature information, determining load information and an energy coefficient of a compressor; according to the rotating speed of the compressor and the load information, determining a first load coefficient corresponding to the current rotating speed of the compressor; and according to the energy coefficient and the first load coefficient, adjusting the current rotating speed of the compressor to obtain the target rotating speed of the compressor. The method can improve the stability of water temperature control of the refrigeration equipment. The invention further discloses a control device for the refrigeration equipment, the refrigeration equipment and a storage medium.

The invention discloses a precise control system, method and device for a leather making process, and the system comprises a rotary drum for leather processing, the rotary drum is provided with a feeding device, the feeding device comprises a control device, a storage tank and a metering device, and the storage tank, the metering device and a feeding pipeline used for communicating with the rotary drum. The material storage tank is used for storing raw materials, the feeding pipeline is used for conveying the raw materials in the material storage tank into the rotary drum through the metering device, the metering device is used for metering the raw materials input into the rotary drum, and the control device is used for remotely controlling the metering device and the rotary drum. An automatic control system is used for replacing original manual feeding, automatic burdening and feeding can be achieved according to process requirements, and meanwhile the feeding amount can be accurately controlled through a metering device. The rotating speed and the rotating time of the rotary drum can be accurately adjusted and can be preset according to the process.

The embodiment of the invention relates to the technical field of heat dissipation, in particular to a heat dissipation assembly, a heat dissipation method and a heat dissipation device.The heat dissipation assembly comprises a radiator, the radiator is provided with a heat conduction face, the heat conduction face is further provided with a device containing area, and the device containing area is used for containing a device to be subjected to heat dissipation; the heat-sensitive element is electrically connected with the control circuit, the control circuit is used for adjusting the rotating speed of the fan based on the change of an electric signal of the heat-sensitive element, the heat-sensitive element is fixed to the area, except the device placing area, of the heat conduction face, and the electric signal of the heat-sensitive element corresponds to the temperature of the heat conduction face. According to the embodiment of the invention, the heat dissipation capability of the heat dissipation assembly is improved.

The invention discloses a speed change device, a speed change system, a control method of the speed change system and an automobile. The speed change device comprises a power unit, a first speed change mechanism, a second speed change mechanism, a power output unit and a speed regulation unit, wherein the first speed change mechanism is connected with the power unit and comprises a first power output part, the first power output part can at least form a first rotating speed under driving of the power unit, the second speed change mechanism is connected with the power unit and comprises a second power output part and an intermediate shaft, the second power output part can at least form a second rotating speed under driving of the power unit, the intermediate shaft is used for transmitting power of the power unit to the second power output part, the power output unit comprises a power output shaft and a connection switching part which is connected with the power output shaft and is selectively connected with the first power output part or the second power output part, the speed regulation unit is connected with the intermediate shaft, and the speed regulation unit is used for adjusting the rotation speed of the intermediate shaft during the process in which the connection switching part is connected with the first power output part or the second power output part.

The invention discloses a submersible mixer experimental device, which comprises a submersible mixer (1) and a support column (2). The tail of the submersible mixer (1) is fixed in the middle of the support column (2), and a The first tension sensor (4) of thrust and the second tension sensor (5) used to measure the torque, one end of the first tension sensor (4) is fixedly connected with the upper end of the support column (2) through a steel wire rope, and the other end is connected through the The steel wire rope is connected to the first fixed point (6), one end of the second tension sensor (5) is fixedly connected to the upper end of the support column (2) through the steel wire rope, and the other end is connected to the second fixed point (7) through the steel wire rope. The experimental device of the invention can simultaneously measure the thrust and torque of the submersible mixer, and has high measurement accuracy.

The invention provides an outdoor fan control method, device and air conditioner, and relates to the technical field of air conditioners. The control method of the outdoor fan includes: obtaining the exhaust pressure of the air conditioner in real time; when the exhaust pressure falls within the first preset pressure range, calculating the first theoretical adjustment amount according to the exhaust pressure; and calculating the first theoretical adjustment amount according to the first theoretical adjustment amount Adjust the speed of the external fan of the air conditioner; when the exhaust pressure falls within the second preset pressure range, obtain the heat transfer temperature difference of the outdoor heat exchanger, wherein the upper limit of the second preset pressure range It is equal to the lower limit of the first preset pressure range; the second theoretical adjustment amount is calculated according to the heat exchange temperature difference; and the rotation speed of the external fan is adjusted according to the second theoretical adjustment amount. The control method of the external fan provided by the present invention can accurately adjust the rotating speed of the external fan on the premise of satisfying the exhaust pressure requirement, thereby avoiding energy waste.

The invention belongs to the technical field of sensor system detection of railway vehicles, and particularly relates to a railway vehicle speed simulation experiment device and a working condition simulation method, and the device comprises a power supply, a quasi-speed rotating wheel, a quasi-speed motor and a drive circuit. The quasi-speed rotating wheel is driven by the quasi-speed motor, and the speed is detected by a speed sensor on the railway vehicle; the power supply is electrically connected with the quasi-speed motor through the driving circuit; the driving circuit comprises a speed regulation knob and a change-over switch; the change-over switch is used for switching the rotation direction of the pseudo-speed motor; and the speed adjusting knob is used for adjusting the rotating speed of the quasi-speed motor. Different vehicle speeds and different advancing directions of the rail vehicle in the advancing process can be simulated, so that the safety and reliability of circuits such as a corresponding sensor system and a feedback control system including a brake system or an alarm system in the rail vehicle can be tested.

The invention discloses a threshing cylinder and a method for adjusting the rotating speed when the threshing cylinder is used for threshing. The threshing cylinder includes a rotating shaft and a plurality of gear rods installed on the rotating shaft, each gear rod is provided with several threshing teeth, at least one tooth More than one force-measuring tooth is installed on the rod, and the threshing drum also includes a force-measuring device for detecting the material resistance of the force-measuring tooth, which can detect and obtain material resistance data reflecting the size of the feed, with high detection accuracy and easy operation Improvement, low cost of improvement. The speed adjustment method includes detecting and obtaining the material resistance of the force-measuring teeth when the threshing drum rotates in the threshing device, obtaining the current feeding amount inside the threshing device, and adjusting the speed of the threshing drum to match the current feeding amount , which can accurately obtain the feeding amount inside the threshing device, realize precise adjustment of the rotational speed of the threshing drum, thereby reducing the broken rate and non-cleaning rate, and improve the working performance and threshing effect of the threshing device.